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Shielded-Twisted-Pair Cable Model for Chafe Fault Detection via Time-Domain ReflectometryThis report details the development, verification, and validation of an innovative physics-based model of electrical signal propagation through shielded-twisted-pair cable, which is commonly found on aircraft and offers an ideal proving ground for detection of small holes in a shield well before catastrophic damage occurs. The accuracy of this model is verified through numerical electromagnetic simulations using a commercially available software tool. The model is shown to be representative of more realistic (analytically intractable) cable configurations as well. A probabilistic framework is developed for validating the model accuracy with reflectometry data obtained from real aircraft-grade cables chafed in the laboratory.
Document ID
20120011154
Acquisition Source
Ames Research Center
Document Type
Technical Memorandum (TM)
Authors
Schuet, Stefan R.
(NASA Ames Research Center Moffett Field, CA, United States)
Timucin, Dogan A.
(NASA Ames Research Center Moffett Field, CA, United States)
Wheeler, Kevin R.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 26, 2013
Publication Date
March 1, 2012
Subject Category
Air Transportation And Safety
Report/Patent Number
NASA/TM-2012-216001
ARC-E-DAA-TN4654
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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